creating zone multiple sites

I am using bind9 and on linux debian 5..
Previously after much of the headache (in setting namesever) i was able to get one of my site online..Now i want my other site to work and i am not able to make it work.

Previously i have only one master record but for now to make my second site work i have created two master record..

I have just replace the example.com with example2.com and save it
So now i have two files..
1. example.com.db
2. example2.com.db

Now while setting up the reverse DNS, i have notice its name was like this..
"192.168.254.rev"
So, i thought it will not work if i create two files here so i pasted the code two time one for example.com and other for example2.com (i dont know i can do this or not)